Lyric Choice
So, to start with the positives first, the lyrics you translated from the VSQX to something Teto can read sounds pretty good! I know that's kind of an odd thing to compliment, but trust me, when I was starting out using Teto even with her TTENglishHelper plugin, the @ sounds always made her sound weird and I never thought about changing them because that's just what the plugin suggested, lmao. While you're doing pretty good with it now, just keep in mind certain sounds like @ can be replaced with sounds like A, O or even a (although [a] is less likely to have ending sounds, like I don't think for example [a t] exists-) to better fit the lyric! This can also apply to i sounds by replacing them with E.
Secondly, I won't be commenting on tuning because you said only basic portamento and vibrato exists for the moment, and that's a-okay! So, what I want to give out advice on next is how the voice flows. While I can still understand Teto okay at some points, her voice sounds rather choppy and hard to understand at others. Other times, her voice sounds a bit stretched, like in the "m" in "there's no stopping me". There are some solutions to this, however, which I'll get into now.
Help/Consonant Velocity (beta) + STP
Firstly, select CTRL+A and go to Note Properties. Then, next to Preutterance and Overlap, select Clear if the boxes are greyed in. If they're not, then feel free to ignore this. Then go down to Consonant Velocity (beta). Consonant Velocity is basically just the speed of the consonant, for example, the "k" in "ka". I looked up the BPM for Queen's song and it's BPM is 156, which is pretty fast in my opinion. "Normal Speed" for consonant velocity is considered 100, but feel free to experiment and find out something that works! Just, unless you're doing a super fast song or something, I heard it's best to not go past 200, lol.
Next, same on the Note Properties page is STP! STP will basically subtract milliseconds from the offset, or start of the oto, hence the name, "starting point". STP, for me, goes hand in hand with Consonant Velocity because while Consonant Velocity speeds up the consonant speed, STP allows for more room to be present in the offset, for which some room may be needed in the cases of weird OTOs or just weird USTs/VSQXs in general that already have some defaults set by the creator, you know. Feel free to tell me if this doesn't make any sense. >-<
Again though, feel free to experiment with this value as much as you want. It's really all about experimenting. Lol.
Crossfading
After you've gotten all that done, click OK and go to the top right corner, where your crossfade options are. Now, P2P3 and P1P4 are the actual crossfading methods, while ACPT just manages to figure out what kinds of overlapping needs to be done. When it comes to my UTAU covers in English, so far, I've been doing ACPT > P2P3> ACPT but this could be a really outdated method or only used for Japanese vocals, who knows. Also Optimize, the fourth option, is supposed to fix Envelope errors, although I'm not quite sure myself exactly what it
means by that, for example, if it means the yellow exclamation mark over the note whenever there's an error, then that can easily be fixed within Envelopes themselves, so. >->
Modulation
Finally, maybe erase Modulation or at least turn it down. I'm not sure what it's set at but Teto sounds a bit weird in some places and that could also be a factor.
Sorry for this huuuge wall of text explaining what I need to explain. If it sounds complicated, then feel free to ask me questions and everything, while I'm not an UTAU Guru or whatever (heck no lmaO) I'll be glad to try and help in whichever way I can!